Roller-bearing.



PATEN I'ED FEB. 14, 1905. J. A. LIDBAOK. ROLLER BEARING. APPLICATION FILED JA 1a, 1902. RENEWED JULY 16, 1904.

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' UNITED STATES Patented February 14, 1905.

PATENT JOHN A. LIDBACK, or PORTLAND, MAINE.

ROLLER-BEARING.

SPECIFICATION forming part oi Letters Patent No. 782,347, dated February 14, 1995.

' Application filed January 18, 19Q2. Renewed Ju1y 16,1904'. Serial No. 216,776.

To (all whom it may concern;

Be it'known that 1, JOHN A. LIDBAGI a citizen-of the United States of America, and a resident of Portland, Cumberland county,

State'of -Maine, have invented certain new, and useful Improvements in Roller-Bearingsof' which the following is a specification.

:My invention relates to roller-bearings of that class wherein two members are made to slidelongitudinally one with relation to the other, either in straight lines, as in the case of a cross-head and its guides, or spirally, as.

in the case of a nut and screw. The invention relates particularly to that class wherein antifi'iction balls or rollers areinserted between thesliding members.

I have illustrated'my invention in the accompanying drawings by certain simple forms which show how the invention is to be applied.

a section on the line y y of Fig. 3. Fig.5 is

a detail longitudinal section through one end of the nut, showing the retainer 6' integral with the nut. g

A in Figs.- 1 and 2 represents a screw with a groove or thread acut in it with a suificient duci'ng the balls into their groove. It will be. seen that as these parts move longitudinally one with relation to the other the balls will roll'between the two-opposing surfaces and the pressure willbe normal to the surface'of the ball on its two opposite s'idesthat is to say, the conditions under which roller or ball In the drawings, Figure l is an elevation of a hearings will be present here and the friction of the nut and its screw will be very greatly reduced over the friction due to sliding contact. I

In Figs. 3 and 4, f represents the cross-head with a tongue f fitting loosely inthe groove formed in the guide 6. In this case I insert rollers g between the tongue and the sides of the groove, since the movement is straight. The channel from one side of the tongue to the other is formed by the flange f v While 1 have shown two forms of my de- 1 vice here, it is evident that the essential features of it may be used in a great variety of mechanical movements.

Icla1m- 1. An antifrict on-bearingconslstlng of a screw and a nut havinga thread loosely fitting I between the threads of the screw and an endless series of rolling members interposed between the thread of the nut and the threads of the'screw, there being return-passages extending through-the thread of the nut to form a complete circuit extending on opposite sides of the nut-thread, as set forth.

2. Ari antifriction-bearing consisting of a.

screw and a not having a thread loosely fitting between the threads of the screw, and an endless series of rolling members interposed between the threads of the nut and the thread ,of the screw, there being return-passages extending through the thread of the nut to form a complete circuit extending on opposite sides of the nut-thread, and lateral extensions at each-end of the thread of the nut, in position to retainthe rolling members, as set forth.

Y 3. An antifriction-bearing consisting of an inner member having a groove and an outer member having a thread loosely fitting between the'threads of the inner member, and an endless series of rolling members interposed between the thread of the outer member and the threads of the inner member and forming a circuit on opposite sides of the thread of the outer member. Signed at Portland, Maine, this 8th day of January, 1902.

- JOHN 'A. LIDBACK.

Witnesses:

S. W. BATES,

W. M. CLEMENT. 

